/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.nhncorp.neptune.client.nql.element;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import com.nhncorp.neptune.client.RowFilter;
import com.nhncorp.neptune.common.conf.NConfiguration;

/**
 * @author jindolk
 *
 */
public class WhereExpression implements WhereExpressionElement {
  List<WhereExpressionElement> elements = new ArrayList<WhereExpressionElement>();
  
  public void addElements(List<WhereExpressionElement> elements) {
    this.elements.addAll(elements);
  }
  
  public void addElement(WhereExpressionElement element) {
    this.elements.add(element);
  }

  @Override
  public String getQuery(NConfiguration conf) {
    String result = "";
    for(WhereExpressionElement eachElement: elements) {
      result += eachElement.getQuery(conf) + " ";
    }
    return result;
  }
  
  public boolean isRowKeyElement() {
    return false;
  }

  /**
   * @return
   */
  public List<WhereExpressionElement> getElements() {
    return elements;
  }

  @Override
  public void initFilter(RowFilter rowFilter) throws IOException {
    for(WhereExpressionElement eachElement: elements) {
      eachElement.initFilter(rowFilter);
    }
  }
}
